Single-phase 3L PR controlled qZS inverter connected to the distorted grid

This paper presents a single-phase three-level NPC qZS inverter connected to a distorted grid using PID and PR regulators. A case study system along with the control strategy are described. Tuning approaches for PID and PR regulators are addressed and validated by means of simulation results. The stability domain and limitations of the regulator parameters are also discussed.

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